| Main Title |
Influence of a Hexachlorobiphenyl in Great Lakes Phytoplankton in Continuous Culture (Journal Version). |
| Author |
Lederman, Timoth C. ;
Rhee, G-Yull ;
|
| CORP Author |
New York State Dept. of Health, Albany. Environmental Health Inst.;Environmental Research Lab.-Duluth, MN. |
| Year Published |
1982 |
| Report Number |
EPA-R-806126; EPA-600/J-82-360; |
| Stock Number |
PB83-243584 |
| Additional Subjects |
Toxicology ;
Phytoplankton ;
Fresh water ;
Growth inhibitors ;
Great Lakes ;
Cultures(Biology) ;
Water pollution effects(Plants) ;
Fragilaria crotonensis ;
Ankistrodesmus falcatus ;
Microcystis ;
Biphenyl/hexachloro
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB83-243584 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
9p |
| Abstract |
The influence of 2,4,5,2',4',5'-hexachlorobiphenyl (HCB) on the growth of Great Lakes phytoplankters Fragilaria crotonensis, Ankistrodesmus falcatus, and Microcystis sp. was investigated in continuous culture under nutrient-sufficient and phosphate (P) limited conditions. Growth rate was inhibited only in F. crotonensis at cellular HCB concentrations as low as 4 to the minus 8th power ng/cell (0.8 micrograms/g dry weight) in nutrient-sufficient cultures; there appeared to be a dose-response relationship between cellular HCB and micrograms. Microcystis sp. and A. falcatus showed no inhibitory effect at cellular HCB levels up to 5 to the minus 8th power ng/cell (3.6 micrograms/g dry weight) and 30 to the minus 8th power ng/cell (11.5 micrograms/g dry weight), respectively. Under P-limited conditions HCB also affected F. crotonensis but not A. falcatus. The initial response of F. crotonensis to HCB addition was a significant increase in micrograms, followed by a sharp decline. In both nutrient-rich and P-limited F. crotonensis the cellular chlorophyll a (chl a) concentration decreased with the accumulation of HCB, yet the 14C assimilation rate per unit chl a increased. Cellular P concentration in the P-limited cells also decreased with the accumulation of HCB. Such responses were not observed in the other species. |
| Availability Notes |
Pub. in Canadian Jnl. of Fisheries and Aquatic Science 39, p388-394 1982. |
| NTIS Title Notes |
Journal article. |
| PUB Date Free Form |
c1982 |
| Category Codes |
6T; 6F; 57Y; 68D |
| NTIS Prices |
Not available NTIS |
| Primary Description |
600/03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
332921780 |
| Origin |
NTIS |
| Type |
CAT |
